Nine Level Cascaded H-Bridge Inverter with Boost Converter

The concept of utilizing multiple small voltage levels to perform power conversion was patented by an MIT researcher over twenty years ago. Advantages of this multilevel approach include good power quality, good electromagnetic compatibility (EMC), low switching losses, and high voltage capability. They typically synthesize the stair-case voltage waveform (from several dc sources) which has better harmonic spectrum. This paper targets to outspread the information about the working of nine level Cascaded H-Bridge MLI topology with DC/DC Boost Converter for constant DC Source. The output voltage is the sum of the voltage that is generated by each bridge. The switching angle employs Sinusoidal Pulse Width Modulation technique. With this method THD is curtailed. This configuration incorporates Boost Converter in the input side which augments the fundamental output voltage. It also has output filter and thus resultant wave is nearer to the sine wave. Outcomes are verified and observed that yields efficiency around 85%.The analysis of proposed topology has premeditated successfully by using MATLAB/Simulink.